I'm afraid I can't agree with you. Firstly because in our context, I'm speaking about logs, but these are not like servers' logs, this are results from analysis/correction scripts, and results are important, verified, and re-used in some cases to take further actions. But I was propably not clear enough on this point (and the word 'log' is perhaps not the better one in this case, but english is not my mother tongue, sorry ;) )

Secondly and more generally, I think that putting in place a good and well formatted logging does not require a lot of efforts if done at an early stage. This ease the addition afterwards of new information and the retrieve of this information by other processes.

I however fully agree that this must be encapsulated in a separated library, to ease the log of information in the scripts. But I'm not sure that changing the format later is easy, as you have to translate all past logs to the new format